baber/WOPTO huggingface dataset:
Patent GB-1171722-A (GB)
Title: Improvements in or relating to Negative Feedback Amplifiers
IPC: H03F1/34
Filed: 1968-04-01
Abstract: 1,171,722. Transistor amplifier. NIPPON ELECTRIC CO. Ltd. 1 April, 1968 [31 March, 1967], No. 15655/68. Heading H3T. One of the transistors (e.g. Tr1) in the closed loop of a feedback amplifier operates in common emitter mode with respect to the feedback signal and the rest operate in common base mode, the output transistor Tr3 being coupled to the previous transistor by means of a transformer 3 whose output is in phase with its input, and whose leakage inductance is tuned by a capacitor 4 connected between the windings 31, 32 to a frequency above the pass band. The common base mode is said to decrease the phase shifts arising from parasitic impedances in the transistors and increases the phase margin of the open loop, thereby increasing the pass-band of the complete amplifier while maintaining stability. The transformer 3, however, necessary to couple the stages without gain-reducing mismatch, affects the response, and the tuning of its leakage inductance counters this by modifying the response (C, Fig. 2, not shown). The transistor Tr1 receives the input signal from a transformer 12, and operates in common emitter mode with respect to this signal also. In a modification (Fig. 3, not shown), the transistor (Tr1) is arranged to operate in common base mode with respect to the feedback signal, and the second transistor (Tr2) acts in common emitter mode. An R.C. impedance element 5 may be connected across the capacitor 4 to improve the Q of the resonance and to modify the frequency response curve at resonance (d). In a further modification, one of the common base stages (Fig. 4, not shown) has a coil (8) in its base circuit and a capacitor (7) connecting its emitter to its collector to increase H.F. gain.
Patent GB-1412357-A (GB)
Title: Containers and closures
IPC: B65D41/04
Filed: 1973-03-31
Abstract: 1412357 Container closures CONTINENTAL CAN CO Inc 31 March 1973 15677/73 Heading B8T A metallic closure 10 designed for minimizing closure corrosion, has an annular portion 32 in the end panel that lies directly over the radiused portion 17 of a container 11 when it is secured. Sealing compound S is applied on a precoating (not shown) of the end panel 25. By virtue of the seal formed by surfaces 32 and 17 lying outboard and inboard of the container surfaces 14 and 15 respectively, both the contents of the container and the atmosphere are prevented from attacking the area 32 where corrosion may occur.
Patent GB-280461-A (GB)
Title: Improvements in punch-ball apparatus
IPC: A63B69/20
Filed: 1927-06-13
Abstract: 280,461. Rasch, A. June 13, 1927. Punching-balls.- Balls h are carried by a cranked member g so as to be rotatable in a vertical plane between the arms of a support e, itself rotatable about a pivot a, being carried by an arm d. Two opponents endeavour to drive the apparatus round the pivot a until a clapper i carried by the arm d strikes a gong n.
Patent GB-258345-A (GB)
Title: Improved process for the manufacture of cables loaded with alloys of high magnetic permeability
IPC: C22F1/10
Filed: 1925-06-17
Abstract: 258,345. Smith, W. S., and Garnett, K. J. June 17, 1925. Annealing.-A tightly wound loaded conductor is annealed by subjecting it to a low temperature heat treatment followed after cooling by a high temperature heat treatment, the temperature of the first heat treatment being from 500-650‹ C. and the second 880-920‹ C. In an example a copper conductor loaded with an alloy wire composed of 74 per cent of nickel, 20.2 per cent of iron, 5.3 per cent of copper and 0.5 per cent of manganese is heated to 515‹ C. and 820‹ C. or to 650‹ C. and 920‹ C., the cooling being to room temperature. In another example a copper conductor loaded with an alloy wire composed of 76 per cent of nickel, 16.5 per cent of iron, 5 per cent of copper, 2 per cent of chromium and 0.5 per cent of manganese is heated to 650‹ C and 880‹ C.
Patent GB-1348655-A (GB)
Title: Catalysts for the polymerization of olefins
IPC: C08F10/00
Filed: 1971-05-19
Abstract: 1348655 Supported Zeigler olefin polymerization catalyst MONTECATINI EDISON SpA 19 May 1971 [22 May 1970 (3)] 15733/71 Heading C3P Olefins are polymerized in the presence of a catalyst which is the reaction product of (a) an organometallic compound or hydride of Groups I, II or III and (b) the reaction product of an "activated" magnesium halide with a titanium compound, wherein the latter compound contains a Ti-X bond where X is a carbon or sulphur atom, a boron atom of a BR 4  (R is hydrogen or hydrocarbyl), or an oxygen atom bound to a radical of an inorganic acid or a sulphuric acid or bound to the trimethylsilyl radical. The magnesium halide may be obtained in the desired "activated" form by grinding prior to or during admixture with the titanium compound or by formation from heating a Lewis base or acid complex thereof, or from a disproportionation reaction of a Grignard reagent or reaction of the latter with a halogen-containing compound such as HCl. In Examples, conventional Zeigler-type homopolymerizations of ethylene in the presence of hydrogen are performed using catalysts comprising the reaction products of (a) and (b) MgCl 2 -C 5 H 5 .TiCl 3 , C 6 H 5 .S.TiCl 3 , the N,N - diphenyl - thiocarbamate of titanium dichloride,
Patent GB-181362-A (GB)
Title: Method and apparatus for indicating the level of liquid in a tank
IPC: G01F23/16
Filed: 1922-06-07
Abstract: 181,362. Guichard, L. June 7, 1921, [Convention date]. Indicating by measuring volume of air above liquid.-The volume of liquid in a tank is measured indirectly by measuring the volume of air above it by adding a known volume of air and measuring the increase of pressure, the initial pressure being atmospheric. If the tank is large a smaller supplementary vessel of the same height and connected to it at the same level is used. A tank 1 communicating with the atmosphere by a perforated plug 26 contains a cylinder 18 with a conical orifice 20 at the bottom, a valve 22 guided in a bracket 24 being normally raised from its seat by a spring 25. The cylinder is connected by a pipe 17 to a pressure gauge 8 and a pump 7 which contains a piston 12 held at one end of its stroke by a spring 13. An aperture 15 normally connects the gauge and cylinder to the atmosphere but is closed by the piston as it commences its stroke. When the piston is moved quickly to the end of its stroke the valve is closed by the increase of pressure which is registered in the gauge. The gauge may be graduated in volumes to give directly the volume of liquid in the tank. One pump and gauge may be used for indicating the level in two tanks by means of a 3-way valve which will connect the pump to the gauge and either of the tanks.
Patent GB-1137706-A (GB)
Title: Transmission line driver-terminator
IPC: H04L27/144
Filed: 1966-04-12
Abstract: 1,137,706. Coupling signals to lines; two-way transmission. INTERNATIONAL BUSINESS MACHINES CORP. 12 April, 1966 [15 April 1965], No. 15816/66. Heading H3T. A signal is coupled to a transmission line by means of a transformer, the line being loaded by series resistance having an impedance not less than the characteristic impedance of the line, the inductive reactance of the transformer being less than the characteristic impedance at operating frequencies. In the figure a signal is applied through capacitor 210 and resistors 211-213 (some of which may be shorted to vary the output power) to an amplifying transistor 214 followed by two further transistors 230, 231 in parallel. With no input, transistor 230 is conducting at a low level due to the feedback through resistor 250, and transistor 231 is cut-off. A positive half-cycle of the input signal is amplified by 214 and 231 and passes current through the transformer primary 232 and capacitor 234 to ground. The negative half cycle is similarly amplified by 214 and 230 and passed through the transformer. The output impedance presented by the amplifier to the transformer is low (e.g. 1 ohm) and is stepped up ten times by the turns ratio of the transformer. In view of the series resistances 238, 239 each of 2000 ohms, the matching of the line impedance (4000 ohms) remains correct in spite of the low amplifier output impedance and a small transformer can be used without appreciable attenuation of the low frequencies. Two-way operation.-When signals are received along the line the resistors 238, 239 provide a constant-current source to the transformer which steps up the current. A positive and negative half-cycle first drive transistor 231 into conduction and back to cut-off and then drive transistor 230 into higher conduction and back to its original state. Output signals are taken from the collectors of the transistors via capacitors 260, 261 to the line 262. . The invention is used in the frequencyshift data transmission system of Specification 1,137,705.
Patent GB-183985-A (GB)
Title: Improvements in or relating to scaffolding and staging for use in the erection of buildings and other structures
IPC: E04G7/02
Filed: 1921-06-08
Abstract: 183,985. Jefferies, A. F. June 8, 1921. Scaffolding and staging. - In standardized metallic scaffolding comprising vertical members having four-way junction-pieces sliding thereon, the junction-pieces d are formed with tapered recesses to receive lugs on the ends of cross-pieces e, e' and putlogs. The junction-pieces are supported by two-piece sleeves or clamps f; or, alternatively, by supports f<1>, Fig. 5, which engage notches a<1> in bars' a of cruciform section. The feet of the uprights are received by flanged shoeplates b. For diagonal bars, rotatable two-part clamps are provided.
Patent GB-917419-A (GB)
Title: Acoustic absorber and method of forming same
IPC: C03B19/08
Filed: 1959-05-08
Abstract: 917,419. Sound absorbers. PITTSBURGH CORNING CORPORATION. May 8, 1959 [June 20, 1958], No. 15857/59. Class 13. [Also in Group XXIII] An absorber of acoustic energy comprises a body 10, Figs. 1, 3, of open-celled cellular material having recesses 12, 14 extending into it from opposite faces, at least some of the recesses extending more than half way through the body, the recesses entering from one of the faces being displaced from alignment with those entering from the opposite face, and the recesses extending inwardly far enough so that coupling or interaction of pressure fluctuations on either side of the boundary wall separating adjacent recesses is effected through the open-celled cellular material. The body is of glass or other locally brittle material or is of material which is locally brittle at temperatures considerably below room temperature. The open cells may be produced by applying gas under pressure to both sides of a body of closed cell cellular material to break down the cell walls. The recesses may be of circular section and may be punched out by pins 76, 84, Fig. 12, by means of a two-cylinder press. Both cylinders may operate tc punch the recesses or only one plunger 63 may move to force the cellular body 68 forwards to be pierced by pins 84 as well as by pins 76. In another form of absorber, the recesses are slots 28, 30, Fig. 11, which may be cut by parallel circular saws. Two bodies may be adhered together, Fig. 9, with recesses 30 in one body 26 positioned between recesses 34 in the other body 31. The adhesive 36 is in strip form, Fig. 10. The absorbers may be spaced apart on a wall 20, Fig. 5, or inserted in a duct, or suspended in space. Specification 845,799 is referred to.
Patent GB-196559-A (GB)
IPC: C21D9/00
Filed: 1922-06-07
Abstract: 196,559. Gleason Works, (Assignees of Slade, L. D.). April 18, 1922, [Convention date.]. Doors; door frames; charging.- To facilitatd the feeding of metal articles to an electrically-heated hardening &c. furnaco a movable floor section is provided, which, when the door is opened, is automatically moved into a position adjacent the floor of the door opening. In t h e furnace shown the door is movable vertically and carries a shelf 13, which bridges the gap between the support 7 and the floor 6 of the door opening when the door ie in its raised position. The door opening is lined with heat-insulating brick 5. The door consists of a fire-brick body portion 10 enclosed in a metal casing 12, and tight contact with the, plate 9 on which it slides is secured by inclined surfaces 16 and independently adjustable stops 15. The coacting surfaces of the door and the plate 9 are machined. Specification 25897/06 is referred to.
Patent GB-584366-A (GB)
Title: Process for manufacturing a product with porous structure for insulating purposes, adapted to be used especially as a filling substance
IPC: C04B20/06
Filed: 1941-12-09
Abstract: Porous filling materials suitable for heat and sound insulation are obtained with a homogeneous honeycomb structure by burning a clay to which has been added a solution of lignin decomposition products obtained as a bye product in the manufacture of cellulose. Preferably, 1 per cent. of sulphite lye containing 70 per cent. of solid matter, is kneaded with a so called plastic clay of the type found at Refsnaes and Lillebaelt in Denmark, and the mixture burnt.
Patent GB-1313261-A (GB)
Title: Polyamide and process for the production thereof
IPC: D06N3/12
Filed: 1971-05-19
Abstract: 1313261 Water vapour permeable polyamide film SEBASTIANO BOCCIARDO & CIA SpA 19 May 1971 [27 May 1970] 15893/71 Heading B1X [Also in Divisions B5 and C3] Porous films, permeable to water vapour but impermeable to liquid water, are cast from a modified polyamide which is then treated with a solvent, e.g. water, which is itself a solvent for use in preparing the modified polyamide, and then washed with water to remove solvent. After treatment with boiling water and drying at 100-160‹C the films are soft and elastic. The modified polyamide is made by reaction of a linear polyamide and a polyurethane with HCHO or source thereof in solvent for the polyamide and polyurethane. The solvent may be aqueous HCOOH. The reaction may be performed at 40-100‹C. The polyamide may be nylon 6. The polyurethane may be a reactionproduct of a polyester or polyether with a diisocyanate. The wt. ratio polyamide/HCHO may be from 1 to 5. Also present may be a compound which, in the presence of HCHO, acts as a source of sulphonic groups, e.g. Na bisulphite or metabisulphite, in mole ratio HCHO/bisulphite of from 4 to 20. The filmforming solution may be impregnated into or coated on to fabric.
Patent GB-1168214-A (GB)
Title: Potato Harvester
Inventor: KUNZ HANS ULRICH
IPC: A01D17/14
Filed: 1968-04-03
Abstract: 1,168,214. Sorting apparatus. H. U. KUNZ. 3 April, 1968 [5 April, 1967], No. 15926/68. Heading B2H. [Also in Divisions A1 and B8] A potato harvester is characterised in that a rotatable drum 7 is divided into two sections by an annular partition wall 8. A plurality of compartments 11 convey the potato load to first conveyer 13 whose roller spacing determines the size of potato that is retained on it to be transported to a sacking position 18. Alternatively a sieve may be used. Potatoes smaller than this size fall via a shoot 19 into section 10 of the drum 7 and are conveyed to a second conveyor 14. Three or more annular sections in the drum may be used to pre-sort the potatoes more finely, each section being provided with a conveyer.
Patent GB-159482-A (GB)
Abstract: 159,482. Bugatti, E. Feb. 25, 1920, [Convention date]. Turning-gear.-In a motor vehicle in which the crank-shaft a is extended beyond the By-wheel b by means of a hollow shaft d journaled in a bearing e in an extension f of the crank case g and the cardan shaft h is rotatable within the hollow shaft d, as described in Specification 1358/14, a starting motor is provided comprising a rotatable armature mounted upon or geared to the hollow shaft d. The motor is driven as a generator for lighting or battery-charging when the engine is running. In one form, Fig. 1, the armature is mounted directly upon the shaft d and the field magnets k are carried by the casing f. In a modification, the armature is connected by bevel gearing to the shaft d.
Patent GB-1497354-A (GB)
Title: Pleated blind
IPC: A47H5/14
Filed: 1975-04-17
Abstract: 1497354 Blinds VORWERK & SOHN 17 April 1975 [19 April 1974] 15949/75 Heading E1J A pleated blind has loops 7c formed in the material and arranged in vertical rows. The material may have stiffened portions which are positioned between fold lines 8, 8a and are formed by denser or different weaving or knitting. Pull cords 12 are secured to lowermost loops 7c and extend through the other loops and through rings 10c in hangers 10 which are hooked to a tape 9 on the curtain and have heads located in a channel 11. Operation of the cords 12 lifts the blind into an open folded position.
Patent GB-187273-A (GB)
Title: Improvements in and relating to apparatus for cooling, humidifying, and filtering air or the like
IPC: B01D45/10
Filed: 1921-06-11
Abstract: 187,273. Brunton, H. D. June 11, 1921. Air and gases, moistening and washing.-Apparatus for humidifying, cooling or filtering air &c. comprises a casing 1, through which the air is drawn by a fan 13, and in which are arranged at intervals a number of separate sets of perforated plates 2 in the path of the air, each set forming a plurality of zig-zag paths and some or all of the sets being provided with individually-controlled sprinklers 4<1> through which they are supplied with water so that impurities adhere to the wetted plates and the humidity is varied by varying the number of sprinklers in operation. The edges at which the air leaves a set of plates may be bent to provide a channel for water blown across the plate surface. Cooled brine may be used or the water supply' may be heated or cooled, and in draining into a tank, may be filtered by passage through gauze-covered openings in the casing and circulated by means of a pump 5. An overflow pipe 11 limits the amount of accumulated water in the bottom of the casing. A gauze screen 10 may be arranged at the inlet end to prevent solid particles entering the casing.
Patent GB-719213-A (GB)
Title: Improvements in or connected with open arc lamps and electrodes therefor
IPC: H05B31/18
Filed: 1950-06-28
Abstract: 719,213. Arc lamps. OOSTWOUD, J. June 28, 1950 [July 6, 1949], No. 16118/50. Class 39(1) A set of electrodes for use in an open arc lamp in which the electrodes 9, 10, Fig. 1, are arranged substantially in alignment and are clamped with their rear ends in conductive holders 11, 12, preferably of copper, and have their active ends opposite each other and spaced at a predetermined distance apart, the electrodes including their conductive holders being in the form of an integral and interchangeable unit, is characterized in that the unit is provided with an insulated coupling member 14 for the holders extending longitudinally of the electrodes and bridging the space between their active ends. Each of the holders 11, 12 is turned up at its lower end to embrace an electrode. The coupling member 14, which may be made of mica, has connected to it a rigid metal wire 17 which, at its upper end, is bent into the shape of an eye 18. A conductive bridging member 15 of graphite is provided between the facing ends of the electrodes 9 and 10. The arc lamp casing 1 with reflector 2 is provided with guides for the set of electrodes comprising two parallel channel-shaped conductive rails 3a and 3b closed at their lower ends 19, 20 and secured to an insulated body 4 having mounted thereon a funnel-shaped inlet member 5 for the insertion of the set of electrodes. Current supplying terminals are provided at 6 and 7. The set of electrodes can comprise two or more pairs of electrodes 9, 10, 22 as shown in Fig. 3 in which the electrode holders 11, 12, 21 are riveted at 23 to the coupling member 14.
Patent GB-314195-A (GB)
Title: Improvements in twist-lace machines
IPC: D04C1/00
Filed: 1928-06-05
Abstract: 314,195. Jardine, Ltd., J., and Watchorn, E. June 5, 1928. Lace machines.-The points C<1>, D<1> are moved into position for taking up the thread crossings by the action of cams A, B and are moved out of the threads by the action of a spring O. This reversal of the usual practice permits of a material gain in speed. The cams A, B act on rollers L carried by levers G, H which are connected by arms M to the ends of the point-bar brackets N. The vertical movement of the points is imparted by cams P, Q acting on levers R, S connected to the brackets N.
Patent GB-565560-A (GB)
Title: Improvements in power plant for aircraft
IPC: F01N5/00
Filed: 1942-12-03
Abstract: 565,560. Heating aircraft. MACKIRDY, W. Dec. 3, 1942, No. 16260/44. Divided out of 565,531. [Class 64 (ii)] [Also in Groups XXVI and XXXIII] A power plant for an aircraft comprises one or more internal-combustion engines 10 and one or more other type heat engines 11 driven by a gas, such as carbon-dioxide, which is heated by the exhaust, and cooling medium, of the internal-combustion engines, as fully described in Specification 565,531. The second type engine or engines 11 uses working medium operating in a closed circuit, but additional valve gear allows these engines to operate as normal internal-combustion engines. An additional engine 12 is used to drive auxiliaries such as electric generators, air compressors, &c., and heat engines 28, 29 drive a compressor 36 (for the carbon-dioxide) and a pump 16 (for the liquid carbon-dioxide) respectively. The heatexchanger tubes may form part of the structure of the walls of the fuselage, which may be of the pressure-cabin type.
Patent GB-201707-A (GB)
Title: Improvements in harness saddle trees
IPC: B68B3/00
Filed: 1922-06-13
Abstract: 201,707. Fischer, H. June 13, 1022. Saddles.-The leather saddle members are secured to front and rear raised flanges a, b of leather, soft wood, fibre or other penetrable material', secured to a metal tree c, the front end of which is pressed or cut out to form a raised arch with the ends f, connected by a metal bridgepiece j. A bearing-rein pillar k passes through a seat-member m, the front flange a and the bridgepiece j, and is secured by a washer m<1> and a nut. A pin or rivet n secures the member m and a washer r to the flange b, the washer r holding a crupper hook p in place.
Patent GB-763061-A (GB)
Title: Improvements in apparatus for testing gear wheels and other toothed wheels
Inventor: LITTLEWOOD HAYDN WILKINSON
IPC: G01B5/20
Filed: 1953-06-15
Abstract: 763,061. Gauging toothed gears; gauging departure from standard form. BRITISH THOMSON-HOUSTON CO., Ltd. June 15, 1953, No. 16402/53. Addition to 761,543. Class 106 (2). An apparatus for testing gear wheels comprises a base 1, Fig. 1, a standard rack 66 slidable thereon, a vertical pillar 2 extending from the base, a carrier 13 slidable on the pillar 2, the carrier 13 having means 62 for movably supporting a gear wheel 65 in engagement with the rack 66, and a probe 16 mounted on a second carrier slidable on the pillar 2 for indicating any vertical displacement of the gear wheel 65 when rotated by moving the rack 66. The means 62 is a four-armed lever pivotally supported on the carrier 13, two of the arms 63 supporting the wheel 65, the third arm 67, Fig. 2, engaging the probe 16, and the fourth arm 70 carrying counterbalance weights 23.
Patent GB-288457-A (GB)
Title: A flexible shock absorbing spring coupling for insertion in shaft lines
IPC: F16D3/62
Filed: 1927-06-21
Abstract: 288,457. Walmsley, J. June 21, 1927. Shaft couplings.-A resilient shaft coupling comprises slightly bowed springs E connecting studs C, G, which are mounted respectively on the shaft members B, D and engage enlarged holes I, K in the opposite member to limit the extension or compression of the springs.